Malicious PDF — malware analysis report

Static analysis result for SHA-256 12c78101df49b6e5…

MALICIOUS

PDF

83.2 KB Created: 2021-09-10 07:17:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: d10734e0cda9f9a2ecc88c10af18dbb8 SHA-1: 93db2aff75f42def146bf5528a11afdd3e76b17d SHA-256: 12c78101df49b6e598e1a8d4c3db94ba32e7ad714728045ab638da8aa76959e7
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

This PDF document is flagged as malicious by ClamAV and an ML classifier, indicating a phishing attempt. The heuristics reveal it contains a link farm pointing to compromised WordPress uploads and disposable hosting, likely serving as a lure for credential harvesting or MFA code theft. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious sites for phishing purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://rotang.net/userfiles/file/futetidesadetotuwa.pdf In PDF document text
    • http://dalhousieretreat.com/cote_dor_import/admin/ckfinder/userfiles/files/60369725984.pdfIn PDF document text
    • http://2016.letnifestiwal.pl/ckfinder/userfiles/files/fanikufemarerixivaxo.pdfIn PDF document text
    • https://pasifikendustriyel.com/userfiles/file/16184252514.pdfIn PDF document text
    • https://hotlinepro.in/admin/userfiles/file/10082291570.pdfIn PDF document text
    • https://ukmriptek.org/codeIgniter-hmvc/userfiles/files/418474671.pdfIn PDF document text
    • https://cvconstructionsgoa.com/pharma/admin/userfiles/file/pupukepo.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/68209484778.pdfIn PDF document text
    • http://learningkey.org/userfiles/mosomelidotidujafozur.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/xetexuwevebazudamibi.pdfIn PDF document text
    • http://thestarbusan.com/FileData/ckfinder/files/20210909_78EF91DC5AA9E2E8.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/1e790f024c00115d301d6a9cfb396da8/vitikulajojusu.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/5ffdff7cc98ab133597d8a51500f5bf4/tuxerobax.pdfIn PDF document text
    • http://travelbilet.ru/sites/default/files/file/foxerum.pdfIn PDF document text
    • http://patrick-vallot.com/upload/files/ginesudepodorox.pdfIn PDF document text
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/sofamezesotusafebukas.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131f873942fd---1588506040.pdfIn PDF document text
    • https://micsys.in/userfiles/file/29230686672.pdfIn PDF document text
    • http://www.serenissimaservizi.com/files/posojogaviparadopasawi.pdfIn PDF document text
    • http://viswinkelindex.nl/images/uploads/pisisunepumovonat.pdfIn PDF document text
    • http://goldenstarhotel.vn/images/uploads/files/68156841367.pdfIn PDF document text
    • http://esistore.be/userfiles/file/piletawuzadelel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=how+to+transfer+photos+using+bluetooth+iphonePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB43 19716 bytes
SHA-256: 2304cca7c96db7da3f487f3bcef30026ec78766e83a0860d00dcc44402e8c7e5
font_01_sfnt_off00010e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12619 10952 bytes
SHA-256: 84af6e872642f8307001c3e972444e5465092166a0d12fb4d56c0470b01451c4

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